Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Start the engine and allow it to idle.
2. Move the Transfer Case Lever to each position several times.
3. With the scan tool, read the DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 3.
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
ATTEMPT TO SET THE OPPOSITE DTC
1. Turn the ignition off.
2. Disconnect the Transfer Case Selector Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, read the TIPM DTCs.
  Does the scan tool display DTC C1405-TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH?
  
  Yes
  - Replace the Transfer Case Selector Switch in accordance with the Service Information. Refer to SENSOR, Position , Removal .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3.
CHECK THE (D201) MODE SENSOR A CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Mode Sensor A Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Measure the resistance between ground and the (D201) Mode Sensor A circuit.
  Is the resistance above 10k Ohms?
  
  Yes
  - For Power Wagon vehicles, Go To 4.
  - For all others, replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information. Refer to MODULE, Totally Integrated Power (TIPM) , Removal .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the short to ground in the (D201) Mode Sensor A circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D201) MODE SENSOR A CIRCUIT FOR A SHORT TO THE (K91) SENSOR GROUND CIRCUIT

Fig 2: Checking Mode Sensor A Circuit For A Short To Sensor Ground Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (D201) Mode Sensor A circuit and the (K91) Sensor Ground circuit at the Transfer Case Selector Switch harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information. Refer to MODULE, Totally Integrated Power (TIPM) , Removal .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the short between the (D201) Mode Sensor A circuit and the (K91) Sensor Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .